Tomahawk
graphicImage tag

This tag is used to display the image on the
page. This tag renders an html "img" element. This tag
renders the image file stored in the location specified in the "value"
attribute of "graphicImage" tag. If this image
file is not present in the specified location then the value of the alt
attribute is displayed instead of the desired image file. In this
example, value attribute is set to the location "images/LOGO.gif"
and alt attribute is set to "This is alternative text if any problem in rendering image.".
So this image is displayed on the page, if there is any problem in
getting this image file ("images/LOGO.gif") then
the text specified in the alt attribute ("This is alternative text if any problem in rendering image.")
is displayed on the page. We can set width, height of the
image. If we want tooltip for this image to be displayed when focus
comes to the image, then we can use title attribute. There are
several attributes of this tag to give it different look and structure
like if we set ismap attribute to true within anchor tag then the
positon of the pointer of mouse is displayed at the bottom of browser
window and if we set the usermap to any map then we can select area and
link this area to any address of other page.This component also has ability to be visible or not visible according
to the role of the user. In the same way, it also has the ability to be enable
or disable according to the user role. This component also has the capability
to render the id for the component just the same as we have mentioned in the id
attribute of the tag. Normally the naming system of JSF renders the id for the
component with some additional text, typically with id of the form as prefix.
But this component has an attribute forceId which forces the component to render
the same id mentioned in the id attribute.

Rendered Output :This is the output of the above code in which an image "LOGO.gif"
is displayed. In the bottom of the image you can see the position of the
cursor over the image. In this figure it is 16,14. The position starts
from the upper left corner of the image.

This figure shows the result of using usemap
attribute. When we move the pointer of the mouse over the circle in the
image and click anywhere we will move to the address provided in the map
for the circled area. In this example it is "roseindia.net./jsf".

id : This is the value which is used to
uniquely identify the component within the closest container like form or
subview. The main thing to remember is that its value must be a static
value.

binding : This attribute is used to specify
the property of the backing bean with which this component instance is to be
bound.

rendered : Its default value is true.
If this attribute is set to true then this component is presented in
the page to the user. If false, then this component is not rendered.

url : This is the alternative of the value
attribute.

value : This attribute is used to provide the
URL of the image.

dir : It is used to set the direction of the
text to be displayed. It can take two values LTR(left to right) and RTL
(right to left).

lang : It is used to set the base language of
the component when displayed.

style : It is used to set the CSS style
definition for the component.

title : It is the standard html attribute. It
is used to set the tooltip text for this component.

styleClass : It is used to set the CSS class
for the component. It is same as html class attribute.

onclick : Script to be invoked when the
element is clicked.

ondblclick : It is used for Java Script code
to be invoked when the element is double-clicked.

onmousedown : It is used for Java Script code
to be invoked when the pointing device is pressed over this element.

onmouseup : It is used for Java Script code
to be invoked when the pointing device is released over this element.

onmouseover : It is used for Java Script code
to be invoked when the pointing device is moved into this element.

onmousemove : It is used for Java Script code
to be invoked when the pointing device is moved while it is in this element.

onmouseout : It is used for Java Script code
to be invoked when the pointing device is moved out of this element.

onkeypress : It is used for Java Script code
to be invoked when a key is pressed over this element.

onkeydown : It is used for Java Script code
to be invoked when a key is pressed down over this element.

onkeyup : It is used for Java Script code to
be invoked when a key is released over this element.

align : This attribute is used to set the
horizontal alignment of the component.

border : This attribute is used to specify
the width of the border of the image.

hspace : This attribute is used to set the
space from left and right.

vspace : This attribute is used to set the
space from above and below.

alt : This is used as an alternate text that
is displayed when browser is not able to display the element.

height : This attribute is used to specify
the height of the image.

ismap : This is a boolean attribute that
defines whether this component used the server side image map.

longdesc : This attribute is used for long
description of the image..

usemap : This attribute is used to specify an
image map to use with this image.

width : This attribute is used to specify the
width of the image. If it is not specified then it takes original width of
the image.

enabledOnUserRole : If the current user has
one of the roles listed in the enabledOnUserRole attribute then enabling or
disabling of the component is decided on the base of "disabled"
attribute. If disabled attribute is set to true then component is disabled
otherwise enabled. If the user is not in the above list then the component
is rendered disabled.

visibleOnUserRole : If the current user has
one of the roles listed in the visibleOnUserRole attribute then processing
of the component is decided on the base of "rendered" attribute.
If the rendered attribute is set to true then component is not rendered
otherwise displayed on the page. On the other hand if the current user
is not in the above list then the component is not processed.

forceId : This is a boolean attribute with
default value false. If this attribute is set to true, the tag is forced to
render the id for the component exactly as mentioned in the id attribute of
the tag. The benefit of this attribute is that we can reference component by
id in the javascript. If we don't use this attribute with the true value
then the id for the component is presented in different format.

forceIdIndex : This is a boolean attribute
with default value true. If this value is true then the the component
displays the index number in its id value if the component is in a list. If
this attribute is set to false then this component will not append index
number as suffix . If forcrId is set to false then its value is ignored.